Chapter 5 - Atomic Structure Flashcards
1
Q
What is an atom?
A
smallest particle of an element that has the same chemical properties element
2
Q
What are atoms made of?
A
protons, neurons, and electrons
3
Q
where are protons found?
A
nucleus of the atoms
4
Q
where are neutrons found?
A
nucleus of the atoms
5
Q
where are electrons found?
A
electron shells
6
Q
what determines the mass of atoms?
A
neutrons and protons
7
Q
what are isotopes?
A
atoms of the same element with the same number of protons but different number of neutrons (mass number is different)
8
Q
what are the properties of isotopes?
A
same chemical properties but different physical properties much as mass
9
Q
average Ar of isotopes?
A
(% of isotope 1) x (Ar o isotopes 1) + (% of isotope 2) x (Ar o isotopes 2) +… / 100
10
Q
what are valence electrons?
A
electrons in the outermost shell.
